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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2283) Possible Memory Leak in StoredFieldsWriter
Date Wed, 24 Feb 2010 17:29:27 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2283?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12837896#action_12837896
] 

Michael McCandless commented on LUCENE-2283:
--------------------------------------------

Yeah it would be good to make the pool shared...

It still bugs me that yourkit is claiming DW was using 256 MB when you've got a 64 MB ram
buffer.... that's spooky.

> Possible Memory Leak in StoredFieldsWriter
> ------------------------------------------
>
>                 Key: LUCENE-2283
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2283
>             Project: Lucene - Java
>          Issue Type: Bug
>    Affects Versions: 2.4.1
>            Reporter: Tim Smith
>            Assignee: Michael McCandless
>             Fix For: 3.1
>
>
> StoredFieldsWriter creates a pool of PerDoc instances
> this pool will grow but never be reclaimed by any mechanism
> furthermore, each PerDoc instance contains a RAMFile.
> this RAMFile will also never be truncated (and will only ever grow) (as far as i can
tell)
> When feeding documents with large number of stored fields (or one large dominating stored
field) this can result in memory being consumed in the RAMFile but never reclaimed. Eventually,
each pooled PerDoc could grow very large, even if large documents are rare.
> Seems like there should be some attempt to reclaim memory from the PerDoc[] instance
pool (or otherwise limit the size of RAMFiles that are cached) etc

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